From 4eed8cca3b1af6b2dd38cfb0ea80d360a0ddcb26 Mon Sep 17 00:00:00 2001
From: Konstantin Bulenkov <kb@jetbrains.com>
Date: Mon, 22 Oct 2012 19:10:22 +0200
Subject: [PATCH] IDEA-90515 Editor tab dragged by dragging Configuration Menu
 pop-out items

---
 .../src/com/intellij/ui/tabs/impl/DragHelper.java      | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/platform/platform-api/src/com/intellij/ui/tabs/impl/DragHelper.java b/platform/platform-api/src/com/intellij/ui/tabs/impl/DragHelper.java
index 523683496154..7bc367c7e958 100644
--- a/platform/platform-api/src/com/intellij/ui/tabs/impl/DragHelper.java
+++ b/platform/platform-api/src/com/intellij/ui/tabs/impl/DragHelper.java
@@ -93,7 +93,7 @@ class DragHelper extends MouseDragHelper {
   }
 
   protected void processDrag(MouseEvent event, Point targetScreenPoint, Point startPointScreen) {
-    if (!myTabs.isTabDraggingEnabled()) return;
+    if (!myTabs.isTabDraggingEnabled() || !isDragSource(event)) return;
 
     SwingUtilities.convertPointFromScreen(startPointScreen, myTabs);
 
@@ -165,6 +165,14 @@ class DragHelper extends MouseDragHelper {
     }
   }
 
+  private boolean isDragSource(MouseEvent event) {
+    final Object source = event.getSource();
+    if (source instanceof Component) {
+      return SwingUtilities.windowForComponent(myTabs) == SwingUtilities.windowForComponent((Component)source);
+    }
+    return false;
+  }
+
   private TabLabel findMostOverlapping(Axis measurer, TabLabel... labels) {
     double freeSpace;